<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>盒模型</title>
    <style>
        .box {
            width: 100px;
            height: 100px;
            background-color: pink;
            padding: 20px;
            color: brown;
            border: 5px solid;
            margin: 20px;
        }
        .criterion_box{
            box-sizing: border-box;
            background-color: aqua;
        }
    </style>
</head>
<body>
    <div class="box IE_box"></div>
    <div class="box IE_box"></div>
    <hr>
    <!-- <div class="box criterion_box"></div> -->
</body>
</html>